yay! a gun-monk. some twenty or so years ago when i was a teenager i too was into precision marksmanship. had a 7mm Thompson Contender (5.56 NATO stretched to take a 7mm bullet), a single-shot breech loading pistol with a 4x scope. had to lay on your back and prop it up against your leg to get any stability, kicked like a mofo but would put bullets through the same hole at 100 yards.